The reason I downloaded BibleOilPaintingByNumber and not any other is because it included Mary + the Saints, which most Bible coloring apps don’t. Thank you for that. So since you are appealing to a Catholic audience, and it seems you know that, with the images of popes/priests/nuns available also, I have some suggestions:
1. Please make the coloring pages of nuns (specifically in the “Bible other” section) Saintly and not for viewing pleasure. I don’t want to complain too much because I really appreciate BibleOilPaintingByNumber but it’s also important that we represent consecrated religious accurately.
2. Secondly, a suggestion for the “Daily” tab is to put coloring pages that align with the month. Of course, they don’t have to be exclusively religious, but it would be nice to have a few. For example: May- Mary, June- Sacred Heart of Jesus, October- the Rosary
3. Thirdly, don’t stop! A few requests/suggestions for when you expand the library: coloring pages of different Marian devotions (Our Lady of Carmel, Our Lady of the Rosary, etc) & the Divine Mercy image?❤️
All in all, wonderful app. Keep it up!